Labels in axes 3D module
Labels in axes 3D are by default set to 2D fonts - I suggest switching back to 3D fonts.
Font size slider is not working for 2D fonts.
There's no GUI for more advanced settings of 2D labels (see text glyphs) - e.g. outline.
For 3D fonts, the size is not properly calculated - fonts are too big not representing the % of window size and cannot be set to small enough.
2D font labels do not disappear while input data is disconnected from the module or reconnected to another field (e.g. 3D to 2D). See example - test field (2D) - connect to axes 3d - disconnect from axes 3d, result - labels stay in the viewer:
Another example: - test field (3D) - connect to axes 3d - switch test field to 2D, result: z-axis labels stay in the viewer: